Grammar, Lexis, Functions = Systems. Reading, Listening, Speaking, Writing = Skills. Everything else is noise.
Systems vs Skills:
The Two Types of Lesson
“Grammar, Lexis, Functions = Systems. Reading, Listening, Speaking, Writing = Skills. Everything else is noise.”
Yesterday, we established that language learning is a skill, not a subject — and that the ratio of technique to practice defines whether a lesson actually works. Today we go one level deeper.
Before you can design any lesson, you must answer a single prior question: what kind of lesson is this? Get this wrong and your lesson plan is built on the wrong foundations — regardless of how elegant your activities are.
Every English lesson ever taught belongs in one of two categories. Not three. Not seven. Two.
What Are Systems?
A Systems lesson focuses on the building blocks of the language itself — the components, patterns, and rules that English is made from. There are four systems:
Systems (4 types)
- Grammar
- Lexis / Vocabulary
- Functions / Phrases
- Phonology / Pronunciation
Skills (4 types)
- Reading
- Listening
- Speaking
- Writing
Notice something important: the four systems are things you know about language. The four skills are things you do with it. This is not a subtle distinction — it is architectural. Your lesson plan, your stage sequence, your activity choices, your timing, and your feedback approach all depend on which side of this line you’re standing on.
The Four Systems: What They Are and Why They Matter
1. Grammar
Grammar is the rule system governing how words combine into sentences. It is the most commonly taught — and, paradoxically, the most commonly misunderstood — system in English language teaching.
Cambridge definition: Grammar is “the description of the structure of a language and the way in which units such as words and phrases are combined to produce sentences.” — Cambridge Dictionary of Language Teaching and Applied Linguistics
The key insight for teachers is this: grammar points are not grammar lessons. You cannot “teach grammar” in the abstract. You choose one specific item — “present perfect for unspecified past experience,” “second conditional for hypothetical situations,” “passive voice to de-emphasise the agent” — and build an entire lesson around that one point.
2. Lexis (Vocabulary)
Lexis is far more than a list of words. The Cambridge lexical approach, developed by Michael Lewis in the early 1990s, established that language consists primarily of multi-word chunks — collocations, fixed expressions, idioms, and phrasal verbs — rather than individual words assembled by grammar rules.
This is why “vocabulary lesson” is a misleading term. A lesson on phrasal verbs with ‘get’ is completely different from a lesson on collocations with ‘make’, which is different again from a lesson on hedging language in academic writing. All three are lexis — but they require entirely different pedagogical approaches.
3. Functions (Pragmatics)
Functional language is the language of social action: what we say when we want to apologise, suggest, disagree politely, make a request, or express uncertainty. Crucially, the same function can be expressed through dozens of different grammatical structures — and the “correct” choice depends not on grammar rules but on register, relationship, and context.
When a student asks “What do I say when I want to refuse an invitation without offending someone?” — that is a Functions question. Teaching it requires you to present a range of exponents (the actual phrases) at different register levels, not just one “correct” answer.
4. Phonology (Pronunciation)
Phonology is the most frequently omitted system in English language classrooms, despite being the one that most directly determines whether communication succeeds or fails. A student can have perfect grammar and rich vocabulary and still be misunderstood if their phonology is consistently inaccurate.
Phonology teaching covers: individual sounds (segmental phonology), word and sentence stress (suprasegmental phonology), intonation patterns, and connected speech features such as elision, assimilation, and linking.
MFP: How to Teach Any System
Every Systems lesson — whether it focuses on grammar, lexis, functions, or phonology — must address the same three dimensions. These dimensions are known in ELT as MFP: Meaning, Form, and Pronunciation. A fourth dimension, Appropriacy, is added for lexis and functions.
Click each tab to explore what each dimension requires of you as a teacher:
Does the student understand what this language does?
Meaning is not the same as translation. A student who can translate “present perfect” into their L1 does not necessarily understand its function in discourse — what work it does, what it signals to a listener, why a native speaker chooses it over the past simple in a given moment.
The teacher’s primary tool for checking meaning is the Concept Check Question (CCQ): a yes/no or short-answer question that tests understanding of meaning without using the target language in the question itself.
CCQ sequence: “Is she still alive? — Yes. Does she live in Paris right now? — We don’t know. Did she live there at some point in the past? — Yes. Do we know exactly when? — No.”
These four questions verify understanding of the ‘experiential’ meaning without once explaining the grammar rule.
Does the student know how to produce this language accurately?
Form refers to the structural properties of a language item: its word order, the auxiliary verbs it requires, its inflections, the prepositions it collocates with, and the grammatical patterns that follow it.
Form is what students get wrong in controlled practice — and the errors are specific and predictable. A teacher who has analysed form before the lesson knows which errors to anticipate and how to address them without derailing the lesson.
Common form error: “I have went” (applying past simple instead of past participle)
Vocabulary (look forward to): look forward to + gerund (-ing form)
Common form error: “I look forward to see you” (infinitive instead of gerund)
Can the student produce this language in a way that will be understood?
Pronunciation in a Systems lesson is not a separate “pronunciation activity” bolted on at the end. It is the third dimension of every vocabulary or grammar item presented. Every item taught requires a phonemic transcription, a stress marking, and a drilling sequence before students leave the presentation stage.
The three elements to address: the phonemic transcription (so students know the sounds), the stress pattern (which syllable receives primary stress), and any connected speech features relevant to natural production.
Pronunciation analysis: /ˈjuːstə/ — NOT /juːzd tuː/
Stress: on the first syllable (USED to)
Connected speech: the /d/ in “used” elides; the “to” weakens to /tə/
Drilling: choral → backchain → individual: “habits → old habits → used to → used to have old habits”
Does the student know when — and when not — to use this language?
Appropriacy (also called register or pragmatic competence) is the dimension that separates grammatically correct language from socially intelligent language. A student who says “Give me the salt” to a colleague has perfect form — and a communicative failure.
Appropriacy is particularly critical for two systems: Functions (where the same communicative intent can be expressed at different levels of formality) and Lexis (where words with similar meanings carry different connotations and register implications).
Informal: “Can you lend me a pen?” — Neutral: “Could you lend me a pen?” — Formal: “Would you mind lending me a pen?” — Very formal: “I was wondering if it might be possible to borrow your pen for a moment.”
Same communicative function. Four completely different levels of register. Teaching only one “correct” version produces communicatively impoverished learners.
The Four Skills: Receptive and Productive
Skills lessons are organised around what students do with language, not what they know about it. There are four skills, divided into two pairs:
Receptive Skills
- Reading — processing written text
- Listening — processing spoken text
Input-focused. Students receive language.
Productive Skills
- Speaking — producing spoken language
- Writing — producing written language
Output-focused. Students produce language.
Critical distinction: A reading lesson is not a lesson where students happen to read something. It is a lesson where developing reading ability is the primary aim — where gist reading, detailed reading, and inference skills are explicitly taught and practised through staged tasks. The difference between a text used as a vehicle for vocabulary teaching and a text used in a genuine reading skills lesson is the difference between Systems and Skills.
Skills lessons have their own specific stage sequences — different from Systems lessons. A reading lesson follows: Lead-in → Pre-teach blocking vocabulary → Gist task → Detail task → Follow-on (productive task). A speaking lesson follows: Lead-in → Language input → Content preparation → Speaking task → Content feedback → Language feedback. These are not interchangeable frameworks.
The Complete Lesson Type Map
This is the architectural diagram your school’s Blue Lesson Frameworks is based on. Every English lesson you ever teach will appear somewhere on this map.
Classify the Lesson
Classify each lesson title
Tap or drag each lesson title into the correct column — Systems or Skills. The aim of the lesson is the deciding factor, not the activities used.
The Lesson Type Determines Everything
This distinction is not academic. It has direct, practical consequences for how you plan and teach. Here is what changes depending on which type of lesson you are teaching:
| Aspect of teaching | Systems lesson | Skills lesson |
|---|---|---|
| Main aim | Students will be able to USE [specific language item] | Students will PRACTISE [skill] in the context of [topic] |
| Lesson framework | PPP / TTT / Text-based / Situational | Skills framework (receptive or productive) |
| First priority | Language clarity (MFP analysis) | Authentic text / task selection |
| Error correction | Immediate during controlled practice | Delayed — after fluency activity |
| Success measure | Accurate use of target language | Communicative task completion |
| Feedback focus | Accuracy of form and pronunciation | Content first, language second |
Your Tasks for Today
Label each of the following six lessons as either Systems or Skills. Then write one sentence for each explaining the deciding factor — not just what the lesson includes, but what its primary aim is.
- (a) A lesson on past simple regular and irregular verbs at A2 level
- (b) A lesson using an interview podcast to develop listening comprehension at B1
- (c) A lesson on expressing disagreement politely for B2 professionals
- (d) A lesson where students write and exchange personal emails at A2
- (e) A lesson on word stress patterns in two- and three-syllable words
- (f) A lesson using a travel brochure to practise reading for specific information
- (a) Systems / Grammar. The aim is accurate production of a specific grammatical form. Even though students may read or speak during the lesson, the primary measure of success is correct use of the past simple.
- (b) Skills / Listening. The podcast is the object of teaching — developing the ability to extract information from spoken discourse. Any language work is subsidiary.
- (c) Systems / Functions. Teaching the pragmatic competence to disagree within a specific register is a functional language aim. The test of success is appropriate use of the target phrases.
- (d) Skills / Writing. The primary aim is developing communicative writing ability — organisation, register, and expression in the context of personal correspondence.
- (e) Systems / Phonology. Word stress is a component of phonological knowledge. This is a Systems lesson even though no grammar or vocabulary item is being taught.
- (f) Skills / Reading. The aim is to develop the ability to locate specific information in a text efficiently — a reading strategy lesson, not a vocabulary lesson.
Using the aim formula from Day 1 — “By the end, students will be able to [function] using [specific language] in the context of [task/situation]” — write:
- One complete Systems aim for a B1 vocabulary lesson on the topic of technology
- One complete Skills aim for a B1 reading lesson using the same topic
Then: what is the single most important difference between the two aims you just wrote? Write one sentence.
Systems aim (Vocabulary): “By the end, students will be able to describe technology habits and problems using the following 6 lexical items: update (v/n), data, device, crash (v), download (v/n), wireless — in the context of a paired discussion about their daily phone use.”
Skills aim (Reading): “By the end, students will be able to read an article about smartphone addiction for gist and specific information, identifying the writer’s main argument and three supporting statistics.”
The key difference: The Systems aim names specific language items that students will be able to produce; the Skills aim describes a reading task that students will be able to complete. One is about language knowledge; the other is about language performance.
Here is a lesson description that is commonly misclassified. Read it carefully, then decide: is this a Systems lesson or a Skills lesson? Justify your answer.
A teacher gives students an authentic news article about electric vehicles. Students read for gist, then for detail. The teacher then focuses on 6 vocabulary items from the text — presenting their MFP, drilling the pronunciation, and running a controlled practice gap-fill. The lesson ends with a personalised speaking activity using the new vocabulary.
Is this a Systems or Skills lesson? What is the teacher’s primary aim? How would you rewrite the aim to make the lesson type unambiguous?
Despite the reading text and the reading tasks at the start, the primary aim of this lesson is vocabulary — specifically, presenting and practising 6 lexical items from the text. The reading tasks are the context for the vocabulary, not the aim themselves.
This is called a text-based vocabulary presentation — one of the six lesson frameworks in your school’s Blue Lesson Frameworks document. The text provides a rich, authentic context for the vocabulary, but the success of the lesson is measured by students’ ability to use those 6 items — not by their reading ability.
If the teacher had assessed “Can students now extract specific information from a news article efficiently?”, it would be a Skills lesson. Because they’re assessing “Can students use sustainable, emission, battery, infrastructure, charging, grid accurately?”, it is a Systems lesson.
Rewritten aim (makes it unambiguous): “By the end, students will be able to discuss electric vehicles using the following 6 items: sustainable, emission, battery, infrastructure, charging, grid — in the context of a paired opinion exchange.”
The reading text was a means. The vocabulary was the end.
Using AI to identify and check lesson types
Open Claude or ChatGPT and try this prompt. Then read the critique below to understand exactly where AI is helpful — and where only your professional judgement can fill the gap.
- The phonology gap: AI almost always produces schedules that are heavy on grammar and vocabulary but omit pronunciation entirely. If your 12-lesson schedule has zero phonology lessons — add one. Pronunciation is a System and deserves its own lesson focus.
- Skills aim quality: Check that the Skills lessons name a specific skill sub-task (e.g., “reading for gist and detail using a travel article”) rather than just a topic (“reading about travel”). A topic is not an aim.
- The ‘reading for vocabulary’ problem: AI often lists “reading to learn vocabulary about X” — which is actually a Systems/Vocabulary lesson, not a Skills lesson. If a lesson’s primary aim is vocabulary acquisition, it is a Systems lesson regardless of what text it uses.
Before you plan any lesson, you must know which of the eight categories it belongs to.
Every English lesson is either a Systems lesson (grammar, lexis, functions, phonology) or a Skills lesson (reading, listening, speaking, writing). This classification determines your framework, your stage sequence, your activities, your error correction approach, and how you measure success.
Ask yourself after any lesson you observe — including your own: “What was the primary aim? Was it about language knowledge or language performance?” If the answer is unclear, the lesson was probably trying to do too many things at once.
The teacher who cannot classify their own lesson is the teacher who cannot explain why a student is still making the same mistake three months later. Classification is not bureaucratic tidiness — it is professional clarity.
Writing a Lesson Aim That Actually Means Something
“‘Students will practise speaking.’ That is not an aim. Here is what a real aim looks like — and how to write one in 2 minutes.”